package com.shiro;

import javax.annotation.Resource;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.LockedAccountException;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;

import com.pojo.*;
import com.service.IUserService;

public class UserRealm extends AuthorizingRealm {

	@Resource
	private IUserService userService;

	@Override
	protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {

		String username = (String) principals.getPrimaryPrincipal();
		SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();
		authorizationInfo.setRoles(userService.findRoles(username));
		authorizationInfo.setStringPermissions(userService.findPermissions(username));

		return authorizationInfo;
	}

	@Override
	protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {

		String username = (String) token.getPrincipal();
		User user = userService.findByUsername(username);

		if (user == null) {
			throw new UnknownAccountException();// 没找到帐号
		}

		// 判断帐号是否锁定
		if (Boolean.TRUE.equals(user.isLocked())) {
			// 抛出 帐号锁定异常
			throw new LockedAccountException();
		}

		SimpleAuthenticationInfo authenticationInfo = new SimpleAuthenticationInfo(user.getName(), user.getPassword(),
				ByteSource.Util.bytes(user.getName() + user.getSalt()), getName());

		return authenticationInfo;
	}
}